Leonard Nimoy lends his vocal cords to Sentinel Prime in Transformers: Dark of the Moon

EW is reporting that the legendary Leonard Nimoy will be lending his smooth vocal stylings to that of 'Sentinel Prime' - the predecessor of Autobot leader Optimus Prime - whose robotic remains can be seen in the film's initial teaser trailer.

Sentinel was found crash-landed on the moon by the Apollo 11 astronauts in 1969. Here's EW with more on his appearance. Beware, though: SPOILERS!

"Later, after being brought to earth, he takes the disguise form of a fire engine in the movies massive, climactic battle through Chicago."